linux-kernel - Re: A quick fio test (was Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3)

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Message-ID: <20070224121816.GF22586@kernel.dk>
Date:	Sat, 24 Feb 2007 13:18:16 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@....com.au>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ulrich Drepper <drepper@...hat.com>,
	Zach Brown <zach.brown@...cle.com>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	"David S. Miller" <davem@...emloft.net>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: A quick fio test (was Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3)

On Fri, Feb 23 2007, Joel Becker wrote:
> On Fri, Feb 23, 2007 at 01:52:47PM +0100, Jens Axboe wrote:
> > Results:
> > 
> > Engine          Depth           Bw (MiB/sec)
> > --------------------------------------------
> > libaio            1             441
> > syslet            1             574
> > sync              1             589
> > libaio           32             613
> > syslet           32             681
> 
> 	Can we get runs with large I/Os, large I/O depths, and most
> importantly tons of processes?  I can absolutely believe that syslets
> would compete well with one process on the system.  But with 1000
> processes doing 1000s of blocking I/Os, I'd really be interested to see
> how that plays out.

Sure, I'll add this to the testing list for monday.

-- 
Jens Axboe

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